DALLAS (CBSDFW.COM) – False insurance claims, time sheet inaccuracies and lying on a sworn statement were among the reasons four Dallas police officers were suspended or fired from their jobs.

Dallas Police Chief David O. Brown handed down the following punishments after disciplinary hearings were held Thursday morning:

Officer Christopher Watson received a 15-day suspension for lying on a sworn statement. Watson witnessed his partner shoot an unarmed, mentally ill man, but signed a sworn affidavit saying the man had lunged at them with a knife. Home surveillance video, which recorded the events leading up to the shooting, proved Watson had lied on the statement. The video also showed Watson violated department procedures in the way he approached a potentially armed man, according to police.

Sgt. Ramon Gonzalez has also received a suspension for inconsistencies on his timecards between January 2011 through July 2012. An audit revealed Gonzalez was paid for 189 more hours than he worked. Gonzalez owes the city nearly $20,000 and will serve a 30-day suspension. According to police, criminal charges could not be pursued against Gonzalez, who has been on the force since 1991 and is assigned to the Northwest Patrol Division.

Senior Corporal Adam Conway, who has been with the department since February 1998, was fired for driving a vehicle under the influence of alcohol. Conway was off-duty at the time and involved in a crash in the city of Rockwall. Conway was arrested and though the criminal charges were dropped, a DPD investigation determined Conway drove while under the influence of alcohol.

Officer Cortenay Howard, hired in April 2004, filed at least three false insurance claims regarding a car burglary, automobile and personal property damage. Howard filed an insurance claim for hail damage, but the claims investigator determined the damage was artificially manufactured. Upon further investigation, the National Insurance Crime Bureau found two other insurance companies had filed complaints regarding claims made by Howard.

All of the above employees have the right to appeal the discipline decisions.